"""
    数据模块，数据交互层
    模型层(Models)
"""


class Vector2:
    """
        向量类 表示位置
    """
    def __init__(self, x, y):
        self.x = x
        self.y = y


class Direction:
    up = 0
    down = 1
    left = 2
    right = 3


